: Can a bullet fall down vertically if shot from the back of an airplane with the same speed ?

Question

Let’s say that an airplane is going at 1200mph, and you have a gun that supposedly fires bullets at 1200mph, there is another airplane tailgating you and you decide to shoot it from a window in the back of the airplane, is it true that the bullet will not hit the airplane but instead fall down vertically with no force ?

This is purely hypothetical

Edit : I remember getting this idea when I was in 8th grade, about when 2 forces have the same intensity and opposite directions they get nulled ? I don’t remember that very well lol

In: Physics

Answer 1

A bullet always fall down vertically at the same speed independent of its back- or forward speed. If you move at the same speed as the bullet, it will always appear to be just falling down vertically with no apparent horizontal movement. However, it will have energy.